The most common forms of iron supplements are:
- Ferrous sulfate: Most prescribed, highly bioavailable
- Ferrous gluconate: Gentler on stomach
- Ferrous fumarate: Highest elemental iron content
Research from the American Journal of Clinical Nutrition shows that ferrous sulfate is generally the most cost-effective and well-absorbed form. However, newer formulations like iron bisglycinate may cause fewer digestive side effects. Consider liquid forms for better absorption if you have digestive issues.
✓ Expert Reviewed: This content has been reviewed by qualified professionals in the field.
Last Updated: September 27, 2025
Disclaimer: Technology information is provided for educational purposes. Implementation should be done by qualified professionals.
Editorial Standards: Technology content is based on official documentation, industry best practices, and reviewed by experienced professionals.